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CE 365K Hydraulic Engineering Design Class 7: Flood Engineering – Local and National

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Presentation on theme: "CE 365K Hydraulic Engineering Design Class 7: Flood Engineering – Local and National"— Presentation transcript:

1 CE 365K Hydraulic Engineering Design Class 7: Flood Engineering – Local and National b52a52-4d45-4c47-8ddc-de2f32cd348e Senator Merkley at 18:00 introduces flood insurance issues

2 Profession A profession is a vocation founded upon specialized educational training, the purpose of which is to supply objective counsel and service to others, for a direct and definite compensation, wholly apart from expectation of other business gain

3 Civil Engineering Civil engineering is a professional engineering discipline that deals with the design, construction, and maintenance of the physical and naturally built environment, including works like roads, bridges, canals, dams, and buildings. Civil engineering takes place on all levels: in the public sector from municipal through to national governments, and in the private sector from individual homeowners through to international companies.

4 Hydraulic Engineering Hydraulic engineering is the application of fluid mechanics principles to problems dealing with the collection, storage, control, transport, regulation, measurement, and use of water Prasuhn, Alan L. Fundamentals of Hydraulic Engineering. Holt, Rinehart, and Winston: New York, 1987

5 Scott Edelman Global leader for water resources at AECOM – coming to speak to our CE 365K class on February 18

6 Flood Engineering – a Local Perspective

7 Halloween Flood, Onion Creek October 2013 Flooded home location Andres Cerda, 7, with his dog Chica, looks towards his damaged bedroom that is not yet inhabitable as the family works on repairs. Maria Medel and her family lost everything in the Halloween floods as their home at 7408 Onion Crossing was completely destroyed. Onion Creek

8 FEMA Flood Hazard Zone

9 Drainage Area above Home Drainage area = 732 km 2, or 282 miles 2

10 Flood Water Elevations Halloween Flood on Onion CreekExpected Hurricane Storm Surge Heights on Gulf Coast

11 Halloween Flood ~ 120,000 cfs Somewhere between 20 yr and 100 yr return period, perhaps 50 yrs Halloween Flood HEC-SSP Flood Frequency Analysis full flood record

12 Halloween Flood, Onion Creek Policy response by the City of Austin – buy out 100 more homes Number of buyouts already done by the City of Austin in the Onion Creek area – 323 homes Approximate amount spent on buyouts - $36 million ($8M of this from FEMA grant funding) A flooded home location There is a very substantial cost of flood damage to those impacted and to the general community around them

13 Flood Engineering – A national perspective National Flood Insurance Program Begun in 1968 Federal government provides a national flood insurance program Local communities regulate land development in floodplains Requires floodplain maps Base Flood Elevation for 100 year flood is the key Keep building floor elevations above this level Keep building out of 100 year inundated area

14 100-year Special Flood Hazard Area (SFHA) We impact the environmentThe environment impacts us

15 Special Flood Hazard Area for Austin

16 Affordability of Flood Insurance b52a52-4d45-4c47-8ddc-de2f32cd348e Senator Merkley at 18:00 introduces flood insurance issues September 18, 2013

17 Senator Mary Landrieu b52a52-4d45-4c47-8ddc-de2f32cd348e Senator Landrieu at 40:00 talks about impacts in Louisiana and the affordability study

18 National Academy Reports National Academy of Sciences chartered by Congress in 1863 to advise the government on matters of science and technology. Later extended to The National Research Council as the operating arm of the National Academy of Sciences, National Academy of Engineering, and the Institute of Medicine Produces study reports on matters of national interest Currently undertaking a study of affordability of flood insurance

19 FEMA Floodplain Map

20 Old, paper FIRM New, digital (D)FIRM - The conversion from FIRMs to DFIRMs was intended to create national, digital floodplain map coverage - The ideal DFIRM: more accurate than paper FIRM, more flexible to use and update, more versatile for community use

21 Base map information *

22 Topography Flood Data Base Digital Map Flood Map Production Process – Data Development Two key inputs: base map imagery and vector line work topography – land surface elevation

23 Analysis of Costs and Benefits of the National Flood Insurance Program 23 National Flood Insurance Act of 1968 established the requirement. The Flood Disaster Protection Act of 1973 made it essential. Biggert Waters 2012 mandates the study of it. Responsibility to our national community compels us to get it right. Affordability Federal Emergency Management Agency

24 The Problem National Flood Insurance Program brings in about $3 Billion per year in flood insurance premiums, primarily from home-owners (97% of all policies) Hurricane Katrina ($17 Billion) and Superstorm Sandy ($7 Billion) drew large amounts of money out of the National Flood Insurance Fund and put it into serious debt to the US government Biggert-Waters 2012 bill attempted to put this right by upgrading insurance cost to full risk-based premium This premium level is higher than many people can afford (hundreds of $$ per year became thousands of $$ per year)

25 Analysis of Costs and Benefits of the National Flood Insurance Program 25 The expanding sphere of Concern The conversation started with individual property owners but now includes voices from business, local communities and Federal agencies Federal Emergency Management Agency

26 Analysis of Costs and Benefits of the National Flood Insurance Program 26 Perception versus Reality A sampling of Pluses and Minuses Individuals - Many policy holders economically distressed + Encourages Mitigation for those few most effected Communities - Potential for unraveling communities + Risk affordability equilibrium National - NFIP Participation declines, Disaster Aid increases + NFIP more fiscally sound Federal Emergency Management Agency

27 Number of Policy Holders Affected (about 1.1 million in total) 27


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